英语句子not 的用法Having been separated from other for millions of years ,Australia has many plants and animals not found in any other country in the world,我想问的是,那个not found,为什么是用not来否定,否定动词时,不是应

麻烦英语高手来看下这个简单的句子填什么He was more or less disappointed at__more guests.A.not having B.there not having C.not having been D there not having been. 学英语挺好玩的帮我还原以下句子Not having been discussed,the problem remained unsolved.也就是,我不想Not having been discussed提前 to be done 和having been done的用法 not be和not to be的区别和用法 英语实意动词和be动词的用法在句子中的用法,谢啦. 英语句子not 的用法Having been separated from other for millions of years ,Australia has many plants and animals not found in any other country in the world,我想问的是,那个not found,为什么是用not来否定,否定动词时,不是应 be good for加not的用法 having done的用法 英语be动词的用法 英语 否定句的用法英语中肯定句改否定句我们一般在be后边加not那没有be就在动词前加 助动词not那还可不可以在没有be的情况下直接在动词后加not我看见一个句子是这样的She hasn’t a bag不应 It is nececarry to be prepared for test.Having the answers ready will be of help.having的用法? 这句英语的语法我不太理解~We would be having a heart to heart discussion.would 的用法 为什么后面是be having 这句话的时态是? not to be 和 don‘t be的用法 It's better to be alone than to be with someone you're not happy to be with.句型的用法?这个句子用的是什么固定句型? not being 和having not?为什么not being 和having not同样可以做句子的开头,而一个not在前,一个在后呢? 在英语,问年龄的句子中,（How old are you?）be动词的用法. 这个句子里as是什么用法which of the following is not mentioned as having to do with good health 主语+be动词+动名词+名词,这个句子是什么结构?哪部分的知识?Halen is having an affair,海伦有婚外恋,就是想知道这个句子的有关知识,和类似句子用法在线加分